2005–2015 · Retro Classic · Buyer's Guide
Pure British Style, Zero Pretense
The T100 is Triumph's most literal love letter to the old Bonneville shape, built with technology that stays politely out of sight. Its 865cc air/oil-cooled parallel twin runs a 360-degree crank, so the 63 hp at 7,250 rpm and 50 lb-ft at 6,000 rpm arrive as a warm, even shove rather than a rush to redline. A 5-speed box and chain final drive keep it mechanically simple. What sets this generation apart is how completely it commits to purist retro styling, the kind that reads as period-correct whether you glance at it from across the lot or study it up close.
On the road it stays easy to like. The handling is light and neutral, planted enough at a highway 70 to feel settled, and forgiving enough that a newer rider never feels out of their depth. It ages well too, with reliability that holds up when the bike is cared for. The honest caveat is that this is old-school electrical territory. Coils, sensors, connectors and the regulator/rectifier can act up on higher-mileage bikes, and a weeping cam cover gasket is common. Budget for a little upkeep and the character stays fully intact.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 63 hp (47 kW) @ 7,250 rpm |
|---|---|
| Torque | 50 lb-ft (68 Nm) @ 6,000 rpm |
| Displacement | 865 cc |
| Engine | Parallel twin |
| Cooling | Air/oil-cooled |
| Gearbox | 5-speed |
| Final drive | Chain |
| Fork | Telescopic |
| Front brake | 310 mm |
| Front tire | 100/90-19 |
| Rear tire | 130/80-17 |
| Wheelbase | 59.1 in (1500 mm) |
| Seat height | 30.5 in (775 mm) |
| Wet weight | 505 lb (229 kg) |
| Fuel capacity | 4.2 gal (16 L) |
| Top speed | 106 mph (170 km/h) |
| Fuel economy | 43 mpg (US) |
Equipment check
Chassis
Comfort
The picture riders paint of the T100 comes from years of slow accumulation: long threads, conversations in parking lots and paddocks, and the steady stream of emails and messages owners send in directly. Put it all together and one pattern runs louder than the rest. This is a bike people trust and hold onto.
What comes up first, almost every time, is how long these engines last. Owners routinely talk about examples past 100,000 miles on nothing more than regular servicing. The 865cc parallel twin earns its own share of that affection, with a deep, thumping character and a broad spread of torque that lets riders overtake and pull cleanly without chasing revs. Many also mention how easy the bike is to look after at home, with infrequent valve checks and a wide catalog of parts behind it.
The complaints are just as consistent, and riders don't hide them. The suspension draws the most, with a non-adjustable fork and preload-only rear shocks that get flustered on rough roads. Some find the single front disc adequate but nothing to write home about. And at 505 pounds wet (229 kg), more than a few describe it as a handful at walking pace in traffic, asking for deliberate input where a lighter retro would not.
Electrical gremlins (coils, sensors, connectors)
Older bikes can suffer from failing coil packs, corroded connectors and broken sensors (MAP, TPS) leading to rough running; often traced to poor grounds and vibration.
Neutral switch failure
The neutral switch can fail, causing the starter to not engage; often temporarily fixable by rocking the bike in gear.
Regulator/rectifier failures
The charging system component can fail, leading to battery drain; a known issue across many air-cooled Hinckley twins.
Cam cover gasket leaks
A common weeping leak develops from the cam cover gasket; usually an easy fix with a replacement rubber gasket.
Where this Triumph Bonneville T100 pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Top speed
Seat height
Forget spec-sheet bragging. Here's who the Bonneville T100 is actually built for.
This is your bike. It's built for exactly your pace: classic looks, small-town stops and long back-road days at an easy rhythm, with the comfort and range to keep you out there all day.
Made for Acadia National Park · Austin / Handbuilt Motorcycle Show · Blue Ridge Parkway
You'll love the style and the community pull, but know this is a light middleweight twin, not a big-inch cruiser. If sound and sheer presence at a rally matter most, weigh that honestly.
Made for Black Hills / Sturgis Rally Hub · A1A — Florida Atlantic Coast · Daytona Main Street / Bike Week
The Hill Country's sweepers suit its light, neutral handling, but this is a relaxed classic at heart, not a sport bike. Come for the character and the ride quality, not outright pace.
Made for Austin / Texas Hill Country · Texas Hill Country BDR-X · Twisted Sisters
If you're cross-shopping the older generation, here's what changed.
Previous generation · 2002–2004
The Real Bonneville Returns
Compare to the previous model →If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
Successor · 2015
One Thousand Pieces Of History
Successor · 2016–2018
Torque, Soul, Genuine Looks
Competitor · 2012–2014
Italian Soul, Featherlight Manners
Competitor · 2008–2013
Italian Style, Honestly Delivered
Competitor · 2012–2016
Seventies Chopper, Factory Fresh
Same Platform · 2015–2016
Austria's Purist British Twin